초 록
figure 1. 수치해석 대상의 Geometry
∂
∂
∂ ∂
∂ figure 2. Simulation Geometry
figure 4. Re=400, Grid Dependency Test figure 3. Grids for Near Wall
∆
∆
Mesh Number friction factor Std.(%)
9600 0.1352339
21600 0.1191462 11.896206
29400 0.1153004 3.2278184
38400 0.1127767 2.1888027
48600 0.1110525 1.5287985
86400 0.1101612 0.8026134
figure 5. Grid Dependency Test: Std 비교
Space Ratio ° ° °
0.15 above 510 510 340
figure 7. Corrugation Angle 별 임계 레이놀즈 수 (Comini et al.[3])
200 400 600 800 1000
0.05 0.1 0.15 0.2 0.25 0.3 0.35
Ali & Ramadhyani PRESENT
f
Re
figure 6. Ali & Ramadhyani의 실험값과의 validation
10 20 30 0.14
0.21
Angle
NOCUT CUT
f factor
W. M. Kays, A. L. London, 1984, “Compact Heat Exchangers, 3rd”, ed. Mcgraw-Hill, New-York
M. M. Ali and S. Ramadhyani, 1992, “Experiments on convective heat transfer in corrugated channels”, Experimental Heat Transfer, vol. 5, pp.175-193
G. Comini, C. Nonino and S. Savino, 2002, “Convective heat and mass transfer in wavy finned-tube exchangers”, international journal of numberical methods for heat & fluid flow, vol. 12 Iss 6, pp 735-755
G. Comini, C. Nonino and S. Savino, 2002, “Effect of space ratio and corrugation angle on convection enhancement in wavy channels”, international journal of numberical methods for heat
& fluid flow, vol. 13 Iss 4, pp 500-519
M. Manglik and E. Bergles., 1995, “Heat Trasnfer and Pressure Drop Correlations for the Rectangular Offset Strip Fin Compact Heat Exchanger”, Exp. Therm. Fluid Sci. 10(2), 171-180 Tae Young Kim. and Sung Jin, Kim., 2009, “Fluid flow and
heat transfer characteristic of cross-cut heat sinks”, International Journal of Heat and Mass Transfer; 52, pp. 5358-5370
![figure 7. Corrugation Angle 별 임계 레이놀즈 수 (Comini et al.[3])](https://thumb-ap.123doks.com/thumbv2/123dokinfo/4845317.283678/3.892.131.731.515.1033/figure-corrugation-angle-별-임계-레이놀즈-수-comini.webp)
